CN102118730B - Method and device for allocating tracking area identity (TAI) list - Google Patents
Method and device for allocating tracking area identity (TAI) list Download PDFInfo
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- CN102118730B CN102118730B CN 201010112157 CN201010112157A CN102118730B CN 102118730 B CN102118730 B CN 102118730B CN 201010112157 CN201010112157 CN 201010112157 CN 201010112157 A CN201010112157 A CN 201010112157A CN 102118730 B CN102118730 B CN 102118730B
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Abstract
The invention provides a method and device for allocating a tracking area identity (TAI) list, wherein the allocating method comprises the following steps: a mobility management entity (MME) judges whether a terminal belongs to the mobile originated only (MO) equipment or infrequent mobile terminated (MT) equipment; and if the terminal belongs to the MO equipment or infrequent MT equipment, the MME includes all subordinate tracking areas in the TAI list and allocates the TAI list to the terminal so that the terminal initiates a tracking area update (TAU) process only in case of crossing the MME. Through at least one technical scheme of the invention, by allocating a large enough TAI list to the MO equipment or infrequent MT equipment, the frequency of the TAU can be reduced. By adopting the allocation mode, the performance of mobility management can be optimized, the MME always knows the position of the terminal, and the connection with the equipment can be established through paging.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of distribution method and device of tracking area identification list.
Background technology
What machine type communication (Machine Type Communication) referred between machine and machine, the communication network by mobile operator carries out communicates by letter.
MTC equipment (Machine Type Communication Device, equipment for machine type communication) is the terminal equipment that is exclusively used in machine type communication in communication network, as distant kilowatt meter recorder, video monitoring equipment etc.MTC equipment is the communication terminal of a kind of unmanned participation, specific type.
MTC server (Machine Type Communication Server, abbreviation machine type communication server) refer to the equipment communicated by communication network and MTC equipment, be equivalent to a server, as the server of intelligent meter data recording system, intelligent public transportation system server etc.
MTC equipment is divided into multifrequency nature according to the difference of application.Wherein, Mobile Originated Only equipment is (only by the equipment of terminal initiating communication, be called for short MO equipment) be a kind of only by the equipment of terminal initiating communication, be characterized in that communicating by letter between terminal and network all initiated by terminal, network can not initiated paging to terminal.
TS 22.368 has defined the business demand for MO equipment:
-Virtual network operator should reduce the frequency of mobile management;
-Virtual network operator can make it only when the terminal initiating communication, carry out mobile management by dynamic-configuration equipment;
-configurable network can be processed the situation that the mobile management frequency reduces;
But-Virtual network operator trigger equipment is set up the communication that terminal is initiated.
MT equipment (Infrequent Mobile Terminated) is another kind of MTC equipment, the equipment that refers to mainly carries out the communication of terminal initiation, but the communication that terminal does not stop is frequently still arranged, and is also that terminal still can receive the paging of network, but not frequently paging.
TS 22.368 has defined the business demand for the MT device characteristics:
-Virtual network operator can reduce the frequency of mobile management;
-Virtual network operator dynamic-configuration equipment reduces the frequency of mobile management;
-configurable network can be processed the situation that the mobile management frequency reduces.
From the business demand of above two kinds of equipment, all need its mobile management is optimized.Below introduce the mobility management process in core net.
The granularity that the EPS system is carried out mobile management to the Idle state terminal is tracking area (TrackingArea, TA).When terminal initial is attached to network, Mobility Management Entity (Mobile ManagementEntity is called for short MME) distributes a TAI list that comprises one or more TA (TrackingArea Identity List, TAI List) for it.When terminal enters a TA who does not belong to registered TAI list, will initiatively initiate the TAU process, MME in the TAU process for terminal distribution new comprise current TA in interior TAI list.Except adhering to (Attach) and tracing section updating (Tracking AreaUpdate, TAU) process, it is the TAI list that terminal distribution is new that network can also heavily distribute in global unique temporary identity in (Global UniqueTemporary Identity Reallocation, GUTI Reallocation) process.
When network need to communicate with the Idle state terminal, by paging and terminal, connect.MME sends beep-page message to the base station in all TA under the TAI list, and terminal responds base station and the TA that beep-page message just shows its place in which base station.
How many size of TAI list and call signaling amounts are conflicting, be also that the TAI list is larger, the frequency of crossing over TAI list border when the user moves is less, so the frequency of TAU is less, but when large TAI list makes paging, signaling amount is very large, also more to other users' interference; Corresponding, the TAI list is less, only among a small circle, sends paging, and signaling amount is just fewer, but the frequency of terminal generation TAU can be larger.Therefore distribute suitable TAI list extremely important to the optimization system performance.
For the characteristic of two kinds of equipment, 3GPP SA1 working group has proposed to reduce the demand of mobile management frequency, but does not propose at present specific implementation method.
A kind of method that reduces the mobile management frequency that is easy to expect is to extend the periodically time-out time of TAU timer, but this still can not be avoided the equipment in mobile, because cross over TAU list border, TAU occurs.Such as being fixed on birds sensor device with it, the default secondary data that sends per month of supposing the system, however due to the movement of equipment, when not sending data, also may be continually TAU.Because the MTC number of devices is numerous, these unnecessary signaling consumptions will reduce the efficiency of system, the cost of increase operation and maintenance.
Summary of the invention
For the one or more problems that exist in correlation technique, the object of the present invention is to provide a kind of distribution method and device of tracking area identification list, with in addressing the above problem one of at least.
For achieving the above object, according to embodiments of the invention, provide a kind of distribution method of tracking area identification list, having comprised: Mobility Management Entity judges whether terminal only belongs to by the equipment of terminal initiating communication or terminal termination device frequently not; And if terminal only belongs to the equipment of being initiated by terminal or terminal termination device frequently not, Mobility Management Entity all is included in all tracking areas of subordinate in tracking area identification list and by tracking area identification list and distributes to terminal, makes only ability initiating updating of tracking area process across Mobility Management Entity time of terminal.
For achieving the above object, according to embodiments of the invention, provide a kind of distributor of tracking area identification list, having comprised: whether the terminal type judge module only belongs to by the equipment of terminal initiating communication or terminal termination device frequently not for judging terminal; And tracking area identification list distribution module, for in the situation that terminal only belongs to the equipment of being initiated by terminal or terminal termination device frequently not, all tracking areas of Mobility Management Entity subordinate all are included in tracking area identification list and by tracking area identification list and distribute to terminal, make only ability initiating updating of tracking area process across Mobility Management Entity time of terminal.
By above-mentioned at least one technical scheme of the present invention, by be only by the equipment of terminal initiating communication or not frequently the terminal termination device distribute enough large TAI list, can reduce the frequency of its TAU.Adopt this method of salary distribution, can optimize the performance of mobile management, and MME always knows the position of terminal, can being connected by paging foundation and equipment.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of Mobility Management Entity and tracking area according to an embodiment of the invention;
Fig. 2 is the flow chart of the distribution method of tracking area identification list according to an embodiment of the invention; And
Fig. 3 is the block diagram of the distributor of tracking area identification list according to an embodiment of the invention.
Embodiment
In machine type communication, the special equipment of two classes is arranged: Mobile Originated Only is (only by the equipment of terminal initiating communication, be called for short MO equipment) and Infrequent Mobile Terminated (mainly by the equipment of terminal initiating communication or the equipment of (communication) of terminal termination frequently, the latter refers to that equipment is mainly used in the communication that terminal is initiated, yet still can carry out not the communication that terminal stops frequently.Characteristics based on these two kinds of equipment, 3GPP SA1 working group has proposed to reduce the demand of mobility management process, but does not propose concrete scheme.The present invention proposes a kind of method that signaling between mobile management, minimizing equipment and network is optimized in distribution by special TAI list.
The communication of MO equipment is only initiated by terminal, and, without to it, sending beep-page message, therefore there is not the excessive problem of paging information amount in system yet, that is to say, for MO equipment, during for its distribution T AI list, can consider the restriction of paging amount to the TAI list.
MT equipment mainly carries out the communication of terminal initiation, and paging is frequently only arranged not, even therefore the paging amount is slightly large, also can not produce too much influence to system on the whole.
Characteristic based on above two kinds of equipment, during for its distribution T AI list, can distribute a TAI list of trying one's best large, makes equipment due to the probability minimum that enters a TA who does not belong to distribution T AI list and occur TAU.How to distribute enough large TAI list, reduce as far as possible the frequency of mobile management?
As shown in Figure 1, suppose that MME1 distributes to terminal by subordinate TA1-TA n-1, consider following two kinds of situations:
1), when terminal enters TAn, because TAn does not belong to the TAI list distributed, still the TAU process can occur, but in fact now MME does not change;
2) when terminal enters TAa, because TAa does not belong to the TAI list distributed, equally the TAU process can occur, but now MME changes, MME2 will obtain from MME1 the contextual information of terminal.
Above two kinds of situations, thought based on reduce the mobile management frequency as far as possible, can think that the TAU occurred belongs to the mobility management process of " unnecessary " under same MME, and across the TAU of MME owing to need between MME, keeping terminal to be registered in all the time in network by the context of exchange termination, be therefore necessary.
Embodiments of the invention propose a kind of method that can reduce the mobile management frequency: during distribution T AI list, MME is included in all TA of subordinate in the TAI list and distributes to terminal, makes terminal only across MME the time, just initiate the TAU process.
Fig. 2 is a kind of flow chart of distribution method of tracking area identification list according to an embodiment of the invention.As shown in Figure 2, the distribution method of this tracking area identification list comprises:
Step S102, Mobility Management Entity judges whether terminal only belongs to by the equipment of terminal initiating communication or terminal termination device frequently not; And
Step S104, if terminal only belongs to the equipment of being initiated by terminal or terminal termination device frequently not, Mobility Management Entity all is included in all tracking areas of subordinate in tracking area identification list and by tracking area identification list and distributes to terminal, makes only ability initiating updating of tracking area process across Mobility Management Entity time of terminal.
Wherein, when terminal is adhered to, in the heavy assigning process of global unique temporary identity, or, in position updating process, can carry out distribution method.
Mobility Management Entity can judge according to the subscription data of terminal whether terminal only belongs to the equipment of being initiated by terminal or terminal termination device frequently not.
If fast mobile terminal causes Mobility Management Entity to change, carry out the tracing section updating process, new Mobility Management Entity is redistributed tracking area identification list according to distribution method to terminal after obtaining the relevant information of terminal.
Tracking area identification list comprises one or more part tracking area identification lists, and the part tracking area identification list comprises one or more tracking areas.The part tracking area identification list is one of following three types: comprised tracking area identification in same Public Land Mobile Nerwork, but it is discontinuous to encode; Institute comprises tracking area identification in same Public Land Mobile Nerwork, but coding continuously; And institute comprises tracking area identification not in same Public Land Mobile Nerwork.
Expression scope by the number of elements in the expansion tracking area identification list increases the tracking area quantity that tracking area identification list can comprise.The highest order of the number of elements in tracking area identification list distribution module expansion tracking area identification list, increase the tracking area quantity that tracking area identification list can comprise.。The tracking area identification list distribution module can, by further increasing the quantity of tracking area identification list, increase total tracking area quantity of distributing to terminal.
Institute comprises tracking area identification and comprises: Mobile Country Code MCC, Mobile Network Code and tracking area code.
At comprised tracking area identification, in same Public Land Mobile Nerwork and encode when discontinuous, Mobile Country Code MCC is identical with Mobile Network Code, and tracking area identification list adopts the compressed encoding form.
At tracking area identification, at same Public Land Mobile Nerwork and coding consecutive hours, Mobile Country Code MCC is identical with Mobile Network Code, and tracking area identification list adopts the compressed encoding form and only identifies the tracking area identification of first tracking area.
Fig. 3 is a kind of block diagram of distributor of tracking area identification list according to an embodiment of the invention.As shown in Figure 3, the distributor of this tracking area identification list comprises: whether terminal type judge module 302 only belongs to by the equipment of terminal initiating communication or terminal termination device frequently not for judging terminal; And tracking area identification list distribution module 304, for in the situation that terminal only belongs to the equipment of being initiated by terminal or terminal termination device frequently not, all tracking areas of Mobility Management Entity subordinate all are included in tracking area identification list and by tracking area identification list and distribute to terminal, make only ability initiating updating of tracking area process across Mobility Management Entity time of terminal.
The terminal type judge module judges according to the subscription data of terminal whether terminal only belongs to by the equipment of terminal initiating communication or terminal termination device frequently not.
Tracking area identification list comprises one or more part tracking area identification lists, and the part tracking area identification list comprises one or more tracking areas.The part tracking area identification list is one of following three types: comprised tracking area identification in same Public Land Mobile Nerwork, but it is discontinuous to encode; Institute comprises tracking area identification in same Public Land Mobile Nerwork, but coding continuously; And institute comprises tracking area identification not in same Public Land Mobile Nerwork.
Expression scope by the number of elements in the expansion tracking area identification list increases the tracking area quantity that tracking area identification list can comprise.The highest order of the number of elements in tracking area identification list distribution module expansion tracking area identification list increases the tracking area quantity that tracking area identification list can comprise.Tracking area identification list can, by further increasing the quantity of tracking area identification list, increase total tracking area quantity of distributing to terminal.
Institute comprises tracking area identification and comprises: Mobile Country Code MCC, Mobile Network Code and tracking area code.
At comprised tracking area identification, in same Public Land Mobile Nerwork and encode when discontinuous, Mobile Country Code MCC is identical with Mobile Network Code, and tracking area identification list adopts the compressed encoding form.
At tracking area identification, at same Public Land Mobile Nerwork and coding consecutive hours, Mobile Country Code MCC is identical with Mobile Network Code, and tracking area identification list adopts the compressed encoding form and only identifies the tracking area code sign of first tracking area.
Particularly, when actual deployment, being distributed in certain region of TA is continuous, the TAI that is also adjacent TA should be continuous programming code as a rule, therefore, to these, continuous TA is used the coded system of Typeof list=001 type, can mean by less memory cell more TA.In addition, its PLMN ID of TA (being also MCC+MNC) that belongs to same MME is identical, even TAC coding is discontinuous, the Partial TAI list of using type of list=000 type is compressed encoding to a certain extent also.
TS23.003 has defined the coded format of TAI: TAI=MCC+MNC+TAC.Wherein, MCC is Mobile Country Code MCC (Mobile Country Code), by three ten's digits, is meaned; MNC is Mobile Network Code (Mobile Network Code), by two or three ten's digits, is meaned; MCC and MNC mean the PLMN sign jointly.TAC is tracking area code (Tracking Area Code), by 4 ten's digits, is meaned, TAC is unique under same PLMN.
TS24.301 has stipulated particular type and the coded format of TAI list information unit.TAI list size minimum is 8 bytes, mostly is 98 bytes most.The TAI list is comprised of one or more part TAI lists (Partial TAI List), in each part TAI list, comprises one or more TA, but the summation of the TA comprised in all Partial TAI list can not be over 16.According to comprised TAI, whether in same Public Land Mobile Nerwork (Public Land Mobile Network is called for short PLMN), and whether coding is continuous, and part TAI list is divided into three types:
-institute comprises TAI at same PLMN, but it is discontinuous to encode, its Type of list=000 of such part TAI list;
-institute comprises TAI at same PLMN, but coding continuously, its Type of list=001 of such part TAI list;
-institute comprises TAI not in same PLMN, its Type oflist=010 of such part TAI list.
The part TAI list of Type of list=000 type, because comprised TAI belongs to same PLMN, the also i.e. Mobile Country Code MCC of all TAI (Mobile Country Code, be called for short MCC) and Mobile Network Code (Mobile Network Code, be called for short MNC) identical, therefore can take a kind of coded format of compression, as shown in the table:
Part tracking area identification list-type of list=" 000 "
The Partial TAI list of Type of list=001 type, because comprised TAI belongs to same PLMN and encodes continuously, also the MCC of all TAI is identical with MNC, and TAC is continuous, therefore can take a kind of more effective coded format, as shown in the table:
Part tracking area identification list-type of list=" 001 "
In above two tables, Number of elements (number of elements) means the TA quantity that this part TAI list comprises, agreement 24.301 is stipulated at present, Number of elements is 16 (01111) to the maximum, if its highest order is set to 1,, regardless of the concrete value of latter four, terminal also is used as Number of elements as 16 processing.For the part TAI list of type of list=000, TAC k means the TAC of k TAI; For the part TAI list of type of list=001, TAC1 means the TAC of first TA in these continuous T A, because comprised TA is continuous programming code, and the TAI that therefore can draw each TA by TAI and the TA quantity of first TA.
Agreement is stipulated at present, and the TA quantity comprised in the TAI list can not be over 16.If the TA quantity that MME manages surpasses 16, do not disclose how all TA are distributed to terminal.Embodiments of the invention propose following methods:
Expansion Number of elements makes and can mean at most 32 TA, and the quantity of the contained TA of whole TAI list can be over 16.
For all TA of MME subordinate continuous situation all, adopt the part TAI list of 001 type.By expansion Number of Elements, each part TAI list can mean 32 TA and only take 6 bytes.If MME subordinate TA number is less than in 32, TAI list and comprises part TAI list and get final product; If MME subordinate TA number, more than 32, can increase the quantity of part TAI list.In the TAI list, be no more than at most under the constraint of 98 bytes, whole TAI list can comprise at most 16 part TAI list, and each comprises at most 32 TA.
For the not totally continuous situation of TA, can adopt the part TAI list of 000 type, or adopt the part TAI list of 000 and 001 type simultaneously.For the part TAI list of 000 type, after Number of Elements expansion, take at most 68 bytes.If MME subordinate TA number more than 32, can increase part TAI list quantity.
If the TAI list distributed by said method has surpassed 98 bytes, and still there is the TA do not comprised, be the one or more TAI lists of terminal distribution so again, increase the tracking area quantity that tracking area identification list can comprise, concrete distribution method as mentioned above.Also can directly increase one or more tracking area lists.
According to above method, the process that MME carries out TAI list distribution is as follows:
When terminal is carried out Attach, MME judges that according to the subscription data of terminal this terminal only belongs to by the equipment of terminal initiating communication or terminal termination device frequently not.
To above-mentioned two kinds of equipment, MME is included in all TA of subordinate in the TAI list, in Attachaccept (adhering to acceptance), distributes to terminal.
If equipment moving causes MME to change, TAU occurs, new MME obtain after the context of terminal check termination property be whether only by the terminal initiating communication or not frequently terminal stop, if so, also its all TA are included in the TAI list and distribute to terminal.
Example one:
A kind of MO equipment for waterline monitoring, stationary distribution is in river alongshore, reported data when water level surpasses preset value, equipment is not accepted downlink data.MME has 20 continuous TA, and when equipment is attached to network, MME distributes to this equipment by these 20 TA, adopts the coded system of type of list=001, comprises part TAI list in the TAI list, wherein comprises 20 continuous T A.When equipment moves in these 20 TA, TAU, can not occur in (being the scope of this MME) simultaneously yet; Only have when equipment exceeds this scope, just can be TAU.
Example two:
A kind of equipment of the MO for animal monitoring, be arranged on it the rare animal in fauna reserve, regularly reports the relevant information of animal.MME has two piecewise continuous TA sections, comprises respectively 8 and 10 TA, and 20 discontinuous TA.Two continuous TA sections are used respectively the part TAI list of 001 mode, take altogether 6*2=12 byte; Discontinuous TA is used the part TAI list of 000 mode, takies altogether the 20*2+4=44 byte.Whole TAI list length is 12+44+2=58 byte.In like manner, when equipment moves in these TA, TAU, can not occur in (being the scope of this MME) simultaneously yet; Only have when equipment exceeds this scope, just can be TAU.
To sum up, by above-mentioned at least one technical scheme of the present invention, by enough large TAI lists of the devices allocation for often there not being downlink data even there is no a downlink data, can reduce the frequency of its TAU.Adopt this distribution method, can optimize the performance of mobile management, and MME always knows the position of terminal, can being connected by paging foundation and equipment.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (16)
1. the distribution method of a tracking area identification list, is characterized in that, comprising:
Mobility Management Entity judges whether terminal only belongs to by the equipment of terminal initiating communication or terminal termination device frequently not; And
If described terminal only belongs to by the equipment of terminal initiating communication or terminal termination device frequently not, described Mobility Management Entity all is included in all tracking areas of subordinate in tracking area identification list and by described tracking area identification list and distributes to described terminal, makes only ability initiating updating of tracking area process across Mobility Management Entity time of described terminal.
2. method according to claim 1, is characterized in that, described Mobility Management Entity judges according to the subscription data of described terminal whether described terminal only belongs to by the equipment of terminal initiating communication or terminal termination device frequently not.
3. method according to claim 1, is characterized in that, when described terminal is adhered to, carries out described distribution method.
4. method according to claim 1, is characterized in that, in the heavy assigning process of global unique temporary identity, carries out described distribution method.
5. method according to claim 1, is characterized in that, in position updating process, carries out described distribution method.
6. method according to claim 5, it is characterized in that, if described fast mobile terminal causes Mobility Management Entity to change, carry out the tracing section updating process, after new Mobility Management Entity obtains the relevant information of described terminal, according to described distribution method, redistribute tracking area identification list to described terminal.
7. according to the described method of any one in claim 1 to 6, it is characterized in that, described tracking area identification list comprises one or more part tracking area identification lists, and described part tracking area identification list comprises one or more tracking areas.
8. method according to claim 7, is characterized in that, by the expression scope of expanding the number of elements in described tracking area identification list, increases the tracking area quantity that described tracking area identification list can comprise.
9. method according to claim 7, is characterized in that, expands the highest order of the number of elements in described tracking area identification list, expands the expression scope that tracking area means the number of elements in list.
10. method according to claim 7, is characterized in that, by increasing the quantity of described tracking area identification list, increase the tracking area quantity of distributing to described terminal.
11. the distributor of a tracking area identification list, is characterized in that, comprising:
Whether the terminal type judge module, only belong to by the equipment of terminal initiating communication or terminal termination device frequently not for judging terminal; And
The tracking area identification list distribution module, for in the situation that described terminal only belong to by the equipment of terminal initiating communication or terminal termination device frequently not, all tracking areas of Mobility Management Entity subordinate all are included in tracking area identification list and by described tracking area identification list and distribute to described terminal, make only ability initiating updating of tracking area process across Mobility Management Entity time of described terminal.
12. device according to claim 11, is characterized in that, described terminal type judge module judges according to the subscription data of described terminal whether described terminal only belongs to by the equipment of terminal initiating communication or terminal termination device frequently not.
13. according to the described device of claim 11 or 12, it is characterized in that, described tracking area identification list comprises one or more part tracking area identification lists, described part tracking area identification list comprises one or more tracking areas.
14. device according to claim 13, is characterized in that, described tracking area identification list distribution module increases by the expression scope of expanding the number of elements in described tracking area identification list the tracking area quantity that described tracking area identification list can comprise.
15. device according to claim 13, is characterized in that, described tracking area identification list distribution module, by the highest order of the number of elements in the described tracking area identification list of expansion, increases the tracking area quantity that described tracking area identification list can comprise.
16. device according to claim 13, is characterized in that, described tracking area identification list distribution module further, by increasing the quantity of described tracking area identification list, increases the tracking area quantity of distributing to terminal.
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| CN 201010112157 CN102118730B (en) | 2010-02-11 | 2010-02-11 | Method and device for allocating tracking area identity (TAI) list |
| PCT/CN2011/070942 WO2011098046A1 (en) | 2010-02-11 | 2011-02-11 | Tracking area identity list allocation method and device |
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| CN104812069B (en) * | 2015-05-25 | 2019-01-15 | 宇龙计算机通信科技(深圳)有限公司 | Position management method, paging method, device and the terminal of terminal |
| CN106572481B (en) * | 2015-10-12 | 2020-10-23 | 中国移动通信集团公司 | Method and device for generating and configuring mobility management parameters, SCOP and MME |
| CN108141795B (en) * | 2015-11-16 | 2021-01-29 | 华为技术有限公司 | Position information distribution method, device and equipment |
| CN106792649A (en) * | 2016-11-24 | 2017-05-31 | 努比亚技术有限公司 | A kind of tracing section updating method and terminal |
| WO2018162111A1 (en) * | 2017-03-09 | 2018-09-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Optimized handling of a ue in mico mode with entire plmn as registration area |
| CN113015154B (en) * | 2019-12-20 | 2022-10-25 | 维沃移动通信有限公司 | TAU method and equipment based on mobile IAB node |
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| CN101272614A (en) * | 2007-03-20 | 2008-09-24 | 华为技术有限公司 | Method, system and device for selecting network equipment |
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| CN101072111B (en) * | 2006-05-12 | 2011-04-20 | 华为技术有限公司 | Method for synchronizing user data concurrently registering two networks for mobile terminal |
| CN101399750B (en) * | 2007-09-30 | 2010-12-08 | 华为技术有限公司 | Processing method, system and device for mobile terminal position updating |
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| CN101272614A (en) * | 2007-03-20 | 2008-09-24 | 华为技术有限公司 | Method, system and device for selecting network equipment |
| WO2009081268A1 (en) * | 2007-12-19 | 2009-07-02 | Telefonaktiebolaget L M Ericsson (Publ) | Inter-domain coordination for mt and mo calls |
| CN101626617A (en) * | 2008-07-10 | 2010-01-13 | 上海华为技术有限公司 | Method, device and system for optimizing paging |
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